Measures potassium in urine collected over 24 hours. Potassium is critical for heart rhythm and muscles.
Helps find the cause of low or high blood potassium, such as kidney or hormonal problems. A 24-hour collection gives a more accurate picture of the total amount passed in a day than a single sample.
Vomiting, diarrhoea, dehydration, weakness, people on BP medicines or diuretics, kidney or heart conditions.
No fasting needed. Collect all urine for 24 hours in the container provided (discard the first morning urine on day 1, include it on day 2).
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
Read our Editorial Policy and Medical Review Process.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
24-hour urine collection in a container provided by the lab (some tests need a preservative).
Usually within 11–35 hours after the sample reaches the lab. You will receive the report online.
